What does prop walk refer to in boating?

Prop walk refers to the side force produced by the rotation of the propeller. This phenomenon occurs due to the way a propeller drives water backward, creating a torque effect that can cause the stern of the boat to move to one side. As the propeller spins, the downward blade pushes water more forcefully than the upward blade, resulting in an asymmetric force that can steer the boat sideways, particularly when operating in reverse.

Understanding prop walk is crucial for boat handling, especially during maneuvers such as docking or navigating tight spaces, where the ability to control side movement can significantly impact safety and precision. Being aware of this effect allows boaters to anticipate their vessel's movement and adjust their steering accordingly to achieve a desired path.